import router from '@/router';
import store from '@/store';
import { Message } from 'element-ui';
import NProgress from 'nprogress'; // progress bar
import 'nprogress/nprogress.css'; // progress bar style
import { getToken } from '@/utils/auth'; // get token from cookie

NProgress.configure({ showSpinner: false }); // NProgress Configuration

const whiteList = ['/login', '/404']; // no redirect whitelist

router.beforeEach(async (to, from, next) => {
	// const store = router.app.$store;
	// if (to.meta && to.meta.name) {
	// 	if (!store.state.keepAlives.includes(to.meta.name)) {
	// 		store.commit('PUSH_CACHE_COMP', { compName: to.meta.name });
	// 	}
	// }
	// start progress bar
	NProgress.start();

	// determine whether the user has logged in
	const hasToken = getToken();

	if (hasToken) {
		if (to.path === '/login') {
			// if is logged in, redirect to the home page
			next({ path: '/' });
			NProgress.done(); // hack: https://github.com/PanJiaChen/vue-element-admin/pull/2939
		} else {
			// determine whether the user has obtained his permission roles through getInfo
			const hasRoles = store.getters.roles && store.getters.roles.length > 0;
			if (hasRoles) {
				next();
			} else {
				try {
					// get user info
					// note: roles must be a object array! such as: ['admin'] or ,['developer','editor']
					const { roles } = await store.dispatch('user/getInfo');

					// generate accessible routes map based on roles
					const accessRoutes = await store.dispatch('permission/generateRoutes', roles);

					// dynamically add accessible routes
					router.addRoutes(accessRoutes);

					// hack method to ensure that addRoutes is complete
					// set the replace: true, so the navigation will not leave a history record
					next({ ...to, replace: true });
				} catch (error) {
					// remove token and go to login page to re-login
					await store.dispatch('user/resetToken');
					Message.error(error || 'Has Error');
					next(`/login?redirect=${to.path}`);
					NProgress.done();
				}
			}
		}
	} else {
		/* has no token*/

		if (whiteList.indexOf(to.path) !== -1) {
			// in the free login whitelist, go directly
			next();
		} else {
			// other pages that do not have permission to access are redirected to the login page.
			next(`/login?redirect=${to.path}`);
			NProgress.done();
		}
	}
});

router.afterEach(() => {
	// finish progress bar
	NProgress.done();
});
